boot-utils: Use main() to avoid pylint redefined-outer-name warnings

  ************* Module boot-qemu
  boot-qemu.py:85:12: W0621: Redefining name 'msg' from outer scope (line 865) (redefined-outer-name)
  boot-qemu.py:104:12: W0621: Redefining name 'msg' from outer scope (line 865) (redefined-outer-name)
  boot-qemu.py:133:12: W0621: Redefining name 'msg' from outer scope (line 865) (redefined-outer-name)
  boot-qemu.py:160:12: W0621: Redefining name 'msg' from outer scope (line 865) (redefined-outer-name)
  boot-qemu.py:170:12: W0621: Redefining name 'msg' from outer scope (line 865) (redefined-outer-name)
  boot-qemu.py:182:12: W0621: Redefining name 'msg' from outer scope (line 865) (redefined-outer-name)
  boot-qemu.py:264:12: W0621: Redefining name 'msg' from outer scope (line 865) (redefined-outer-name)
  boot-qemu.py:280:12: W0621: Redefining name 'msg' from outer scope (line 865) (redefined-outer-name)
  boot-qemu.py:737:8: W0621: Redefining name 'msg' from outer scope (line 865) (redefined-outer-name)
  ************* Module rebuild
  buildroot/rebuild.py:67:12: W0621: Redefining name 'msg' from outer scope (line 175) (redefined-outer-name)
  buildroot/rebuild.py:116:16: W0621: Redefining name 'msg' from outer scope (line 175) (redefined-outer-name)
  buildroot/rebuild.py:122:8: W0621: Redefining name 'msg' from outer scope (line 175) (redefined-outer-name)
  buildroot/rebuild.py:175:8: C0103: Constant name "msg" doesn't conform to UPPER_CASE naming style (invalid-name)

Signed-off-by: Nathan Chancellor <nathan@kernel.org>

Author: nathanchance

boot-qemu.py

@@ -858,7 +858,7 @@ def parse_arguments():
     return parser.parse_args()
 
 
-if __name__ == '__main__':
+def main():
     args = parse_arguments()
 
     if not (kernel_location := Path(args.kernel_location).resolve()).exists():
@@ -943,3 +943,7 @@ def parse_arguments():
     runner.timeout = args.timeout
 
     runner.run()
+
+
+if __name__ == '__main__':
+    main()

buildroot/rebuild.py

@@ -168,7 +168,7 @@ def parse_arguments():
     return parser.parse_args()
 
 
-if __name__ == '__main__':
+def main():
     args = parse_arguments()
 
     if not shutil.which('zstd'):
@@ -183,3 +183,7 @@ def parse_arguments():
 
     if args.release:
         release_images()
+
+
+if __name__ == '__main__':
+    main()